requests-cache

Usage example

And all responses with headers and cookies will be transparently cached to
demo_cache.sqlite database. For example, following code will take only
1-2 seconds instead of 10, and will run instantly on next launch:

foriinrange(10):requests.get('http://httpbin.org/delay/1')

It can be useful when you are creating some simple data scraper with constantly
changing parsing logic or data format, and don’t want to redownload pages or
write complex error handling and persistence.

Note

requests-cache ignores all cache headers, it just caches the data for the
time you specify.

If you need library which knows how to use HTTP headers and status codes,
take a look at httpcache and
CacheControl.